Improvement in spark-arresters for -locomotive-engines



2 sh eets Sheetf. w. MCK. THORNTON &- T. A.-BUCKLAND.

Improvement in Spark-Arresters for Locomotive-Engines.

No. 132,877, Pa tent'ed Nov.5,1872l y M v// m 2Sheets--Sheet2. W. McK. THORNTON & T. A. BUCKLAND Improvement in Spark--Arresters for Locomotiveingines.

Patented Nov'.5,1872.

V new-e2 AM. PHOTUiIT/IDERAPH/G COM! (OSBGRHES PROCESS.)

- suitable height.

UNITED STATES a grrron WILLIAM MOKELVY THORNTON AND THOMAS ALFRED BUGKLAND, OF

ST. LOUIS, MISSOURI.

IMPROVEMENT IN SPARK-ARRESTERS FOR-LOCOMOTIVE-ENGEN ES.

Specification forming part of Letters Patent No. 132,877, dated November 5, 1872.

To all whom it may concern:

Beit known that we,WILLIAMMoK.THoRN- TON and THOMAS ALFRED BUCKLAND, both of St. Louis, in the county of St. Louis and State of Missouri, have invented certain Improvements for Preventing the Escape of Sparks from Locomotive-Engines; and we do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawing making part of this specification, in which Figure 1, Plate 1, is a side elevation of the smoke-stack of a locomotive with the sparkarrester attached to it. Fig. 2, Plate 2, is a section taken vertically and longitudinally through the same. Fig. 3, Plate 2, is a top view.

Similar letters of reference indicate corresponding parts in the several figures.

This invention is designed for preventing sparks which rise from the caps or upper ends of locomotive smoke-stacks from escaping into the air.

In carrying out our invention, we conduct the smoke and sparks as they leave the smokestack through a close cap, which is on top of this stack, and in which are arranged a series of deflecting-plates and an adjustable draftregulating valve; and from this cap the sparks are directed downward and backward into a reservoir, which is covered by a wire-netting, and in which the sparks are trapped and collected, as will be more fully explained hereinafter.

The following description will enable others skilled in the art to understand our invention.

In the accompanying drawing, A represents the stack of a locomotive, which stack may be the usual height or it may be of any other The upper end of this stack is slightly flaring, and has mounted upon it a cap, B, the front, the sides, and the top of which are closed, but the rear end is open and communicates with a reservoir, E, at or near the upper end thereof. The width of the cap B need not be greater than the diameter of the stack A, but the length thereof is somewhat greater, so that the sparks will be conducted backward over a bottom-plate, N, and valve 1), a short distance before they are directed down into the reservoir E. Between the top of the Smokestack and the top of the cap (J is a number of deflectors, g, which ex-' tend transversely across the cap, and are secured by their ends to horizontal side plates G, which rest upon ledges a. The plates 9 are curved and inclined backward, as shown in Fig. 2, so that the sparks, after leaving the upper end of the stack, will be directed backward and downward. Above the deflectingplates g and secured to the top plate of the cap B inside of this cap are two curved deflectors, e e, the latter one of which keeps the sparks out of the extreme front corner of the cap B, while the plate 0, which curves backward and downward in rear of the deflectors g, directs the sparks downward into the reservoir E, as indicated by the course of the arrows in Fig. 2. Just over ,the bottom extension N is the valve or false bottom I), which is hinged in front and held down upon the end of an adj listing-screw, (1, by means of a spring, 0. The screw 61 is tapped through the bottom N, and is used for raising the rear end of the valve 1), when it is desired to contract the outlet from the cap B and sharpen the draft. By means of this adjustable valve the draft can be increased or diminished at pleasure.

The cap B opens into an inverted conical chamher, 0, which is circular in horizontal section, and which is secured on top of the reservoir E. The upper end of this conical chamber is contracted somewhat and covered by a wirenetting, 9, applied to a cap, D. The rear portion of the conical wall is cut away, and so also is its front upper portion, and the edges of said portions are riveted to the elliptical wall of the reservoirE. This forms a head on the reservoir, and at the same time leaves an inclined deflector, i. The body of the reservoir is elliptical in horizontal section, the 1011 gest axis of the ellipse extending fore and aft, and this reservoir, like the stack A, is secured fast upon the boiler-shell by means of a saddle, as shown in Fig. 2. To the rear termina tion of the bottom-plate N a shield, h, is secured, which is sustained in nearly a horizontal position over the inclined deflector i. This shield is circular, and thereis a space between it and the wall of chamber 0, all around, except where it is attached to the bottom plate N. The shield h serves avery important pur pose in the reservoir, as it prevents the sparks which fall below it from again rising about it. In consequence of the great exhaustion which takes place in the reservoir E and the eddies of air therein, most of the sparks which rise will be trapped by the deflector iand prevented from escaping above the shield h. Those sparks which are not arrested by the deflector twill be arrested by the shield h. The sparks which cross directly over to the back of the chamber 0 strike against one or more curved deflectors, ff, shown in Fig. 2, which not only direct these sparks downward, but they also shield the cone and reservoir from rapid destruction. There are no draftopenings into the reservoir below; conseq uent ly there will be very little tendency for the 'sparks to rise after they fall to the bottom of The openings which are made the reservoir. for removing the accumulated sparks will be closed by tightly-fitting valves, F.

Having described our invention, what we claim as new, and desire to secure by Letters Patent, isp 1. The imperforated cap B having curved deflectors g 9 applied within it, in combination with the stack A and with the reservoir E, which has a perforated top, all arranged substantially in the manner described.

2. The combination of the deflector e, curved deflectors g g, and the imperforated cap B, substantially in the manner and for the purpose described.

3. The adjustable valve 1), in combination with the cap B, smoke-stack A, and reservoir E, substantially as described.

4. The combination of the deflecting and. receiving reservoir E having a perforated top, the conical connecting-chamber 0, formed and located as described, imperforated deflecting cap B, and smoke-stack A, substantially as described.

5. The shield h arranged in the reservoir, in combination with the close cap B, substantially as described.

6. The deflector i combined with shield h, and arranged substantially as described. I

7. The deflectors f, arranged as described, in combination with the close cap B and shield h, substantially as described.

WM. MOKELVY THORNTON. THOMAS ALFRED BUGKLAND.

Witnesses:

HEGMAN LEVIN, GEO. P. DOAN. 

